Mattresses flytipping

Two mattresses. Dumped right next to a flytipping sign. I saw the guy doing it, coming out of the flat behind Doneagles chip shop (landlord?). It was late and dark so i didn't confront, but what can the public do to try to discourage or help ppl learn alternatives? By reporting it so the council comes and picks it up it feels like I'm almost encouraging it. Ant advice appreciated. Thanks.